Instead of messing with the original radiator fan shroud i opted to install an electric fan in its.
Jeep tj electric fan relay.
Jeep tj 4 5 out of 5 stars 14 14 product ratings radiator fan shroud for jeep 1997 06 jeep wrangler tj 4 0l 17102 05.
The other wire is a green wire with a diode in it that gets connected to the power 12v.
This article will help you to diagnose the pulse width modulated pwm fan relay on the 1999 2004 jeep 4 0l grand cherokee suvs and or the codes p1491 radiator fan control relay circuit the dealer at the time of this writing will charge you 95 us to diagnose it.
Today we simplify things by making them more complicated.
Radiator fan shroud for jeep 1997 06 jeep wrangler tj 4 0l 17102 05 fits.
The relay has 2 wires comming off of the one terminal one goes to the thermostatic switch which is installed between the thermostat housing and the original coolant temp sensor.
These are high performance electric fans that will improve engine cooling at idle and slow speeds especially important when you re out on the trail.